First, I'll give Chael some points. He brings the Pro Wrestling like Promo to the UFC without sounding like a barely functional Hulk-billy. He also can rarely sound likable in some of them.
Now since that is out of the way, I believe Jones will defeat Sonnen. Not sure how cause Jones is versatile. Sonnen is going to go in with the same game plan he had for Silva, takedown followed by gnp. However, unlike Silva, Jones is really good at wrestling and will have an easier time with defending Sonnen's attempts.

As for Nelson vs Kongo, Nelson. I personally like Kongo better, however I believe Nelson will win.